Preparation of NdMn1-xFexO3+δ single crystals-Effect of preparation atmosphere and iron doping

被引：1

作者：

Mihalik, Matus ^{[1
,2
]}

Mat'as, S. ^{[2
]}

Vavra, M. ^{[1
,3
]}

Briancin, J. ^{[4
]}

Mihalik, Marian ^{[1
]}

Fitta, M. ^{[5
]}

Kavecansky, V. ^{[1
]}

Kopecek, J. ^{[6
]}

机构：

[1] Inst Expt Phys SAS, Kosice 04001, Slovakia

[2] Helmholtz Ctr Berlin Mat & Energy, D-14109 Berlin, Germany

[3] Safarik Univ, Fac Sci, Inst Chem, Kosice 04154, Slovakia

[4] Inst Geotech SAS, Kosice 04353, Slovakia

[5] Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland

[6] Inst Phys, Prague 18221, Czech Republic

来源：

JOURNAL OF CRYSTAL GROWTH | 2014年 / 401卷

基金：

欧盟第七框架计划;

关键词：

Doping; Floating zone technique; Manganites; Rare earth compounds; PRESSURE; GROWTH; NDMNO3;

D O I：

10.1016/j.jcrysgro.2013.11.045

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

We present the study of the effect of crystal growth atmosphere (argon or air) and chemical doping (iron) on the quality and oxygen nonstoichiometry of the single crystals with the general formula NdMn1-xFexO3+delta, which were grown by the optical floating zone method. The analysis of the grown ingots showed that in the Ar atmosphere the losses of the oxygen lead to MnO impurities, but in the air atmosphere some Mn3+ ions are replaced by Mn4+ ions (thence we have observed positive delta). The X-ray Laue diffraction and polarized light microscopy revealed that the twinning of the grown ingots is the common phenomenon. This twinning can be explained by the fact that a/c similar to 1. Neutron diffraction experiment revealed that the preferential growing directions of the compound are (101) and (010). (C) 2013 Elsevier B.V. All rights reserved,

引用

页码：605 / 607

页数：3

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